Originally Posted by CallMeVilla
Smart $$$ says it is a support post. Be very careful with your demolition. Hope you have a nice sawzall to trim the nails and pull off the 2x4's.
And it is. We remove the remaining drywall to find the flange and all. That part was not coming down, so we will proceed with some peace of mid. The smell is solved now that there is water in the bowl.